| Title of Invention | PRODUCING RHEIN AND DIACERHEIN |
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| Abstract | The following description sets forth a process for producing rhein. diacerhein and other diacyl derivatives thereof, which comprises the following steps : treatment of a diphenylketone in which R1 is -OR', -NR'R"", -SR' , where R' and R"" are H, an alkyl or aromatic group : R2 is H or a protective group, R3 is -OH or C1-C4 alkyl with an acid or superacid to give a 1-aminoanthraquinone derivative. diazotisation, replacement of the -NH2 group by -OH . optional removal of the protective group, and acylation. |
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1415-cal-1997-granted-abstract.pdf
1415-cal-1997-granted-claims.pdf
1415-cal-1997-granted-correspondence.pdf
1415-cal-1997-granted-description (complete).pdf
1415-cal-1997-granted-examination report.pdf
1415-cal-1997-granted-form 1.pdf
1415-cal-1997-granted-form 18.pdf
1415-cal-1997-granted-form 2.pdf
1415-cal-1997-granted-form 3.pdf
1415-cal-1997-granted-form 5.pdf
1415-cal-1997-granted-priority document.pdf
1415-cal-1997-granted-reply to examination report.pdf
1415-cal-1997-granted-specification.pdf
1415-cal-1997-granted-translated copy of priority document.pdf
| Patent Number | 219940 | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Indian Patent Application Number | 1415/CAL/1997 | ||||||||
| PG Journal Number | 20/2008 | ||||||||
| Publication Date | 16-May-2008 | ||||||||
| Grant Date | 14-May-2008 | ||||||||
| Date of Filing | 30-Jul-1997 | ||||||||
| Name of Patentee | LABORATOIRE MEDIDOM S.A. | ||||||||
| Applicant Address | AVENUE DE CHAMPEL 24, 1211 GENEVE 12 | ||||||||
Inventors:
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| PCT International Classification Number | A 61 K 31/19 | ||||||||
| PCT International Application Number | N/A | ||||||||
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PCT Conventions:
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